Journal
JOURNAL OF CATALYSIS
Volume 358, Issue -, Pages 19-26Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcat.2017.11.021
Keywords
Interfacial sites; Bimetallic catalyst; Active site; Controlled surface reactions (CSR); CO oxidation
Categories
Funding
- U.S. Department of Energy, Office of Basic Energy Sciences [DE-SC0014058]
- National Science Foundation through the University of Wisconsin Materials Research Science and Engineering Center [DMR-1121288]
- Wisconsin Materials Research Science and Engineering Center [DMR-1121288]
- DOE Office of Science [DE-AC02-06CH11357]
- Sao Paulo Research Foundation (FAPESP) [2014/21988-7, 2015/20477-1, 2015/23900-2]
- National Council of Technological and Scientific Development-CNPq [309373/2014-0]
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [15/20477-1] Funding Source: FAPESP
Ask authors/readers for more resources
Supported Pt catalysts with different Fe/Pt atomic ratios were synthesized using controlled surface reactions to deposit (cyclohexadiene) iron tricarbonyl onto Pt/SiO2 to create Pt-FexOy interfacial sites. X-ray photoelectron spectroscopy measurements show that Pt and Fe species exist as metallic Pt and Fe oxides phases, respectively, after treatment in H-2 at 573 K, whereas Fe becomes more oxidized under reaction conditions for CO oxidation at 313 K (CO:O-2 = 1:1). The addition of Fe increases the turnover frequency of Pt1Fex/SiO2 at 313 K and atmospheric pressure by up to two orders of magnitude compared to Pt/SiO2. The reaction order with respect to the O-2 partial pressure suggests that O-2 adsorption on the surface is likely to be a rate controlling step for both Pt/SiO2 and Pt1Fe0.2/SiO2. The enhanced activity over Pt1Fex/SiO2 catalysts compared to Pt/SiO2 can be associated with a lower energy barrier for O-2 adsorption and activation over Pt-FexOy interfacial sites. (C) 2017 Elsevier Inc. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available
Share Paper
